ON your 10th cruise.
So how will you know if everything is in order BEFORE you get on the ship? Your documents will have those precious words "Please proceed to VIP Check In". AND your Funpass will have VIP on it.
If for some reason neither of these notations appear...just make sure you take your cruise history printed out with you. (They are listed on www.carnival.com
(link Profile...link Cruise History)